Title:
Effect of Hydrothermal Pretreatment, Following by Alkaline Delignification, in Enzymatic Saccharification of Sugar Cane Bagasse
Author(s):
Silva, V.F.N., Labat, G.A., Gonçalves, A.R., Rocha, G.J.M.
Document(s):
Paper
Abstract:
This work had the objective of evaluate enzymatic saccharification of sugarcane bagasse in this raw, pretreated and delignificated forms and then check the effect of pretreatment and delignification in the enzymatic cellulosic conversion from this biomass. The hydrothermal pretreatment was carried on a reactor of 20 L, on the following conditions: 180 °C/10 min, 185 °C/10 min, 190 °C/10 min and 195 °C/10 min, followed of delignification with NaOH 1.0% (w/v), 100 °C for 1h. The results showed that the more severe the process is observed for pretreatment condition at 195 °C/10 min, followed by alkaline delignification. In this condition, 95.8% of hemicellulose and 80.9% of lignin were solubilizated, despite a reduction of approximately 58% of crystalline structure. Experiments of enzymatic saccharification for the bagasse in this condition of pretreatment and delignification showed the conversion of 89.2% against 69.2% of conversion for bagasse only pretreated at 195 °C/10 min, and 6.0% of conversion for raw bagasse. It can conclude that besides the pretreatment step, it`s necessary a step of alkaline delignification for solubilization of lignin still present in the cellulosic fiber which influence the enzymatic action reducing the conversion to cellulose in glucose.
Keywords:
enzymatic hydrolysis, ethanol, pretreatment
Topic:
Biomass Chemistry
Subtopic:
Biomass chemistry: conversion processes to obtain industrial materials
Event:
18th European Biomass Conference and Exhibition
Session:
VP2.7.25
Pages:
1527 - 1533
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-VP2.7.25
Price:
FREE
